| Deepnexa Ltd | Information & communication | 2026 |
| Defactoline Ltd | Wholesale & retail | 2025 |
| Defined Landscaping Ltd | Construction | 2016 |
| Dehal Supermarket Limited | Wholesale & retail | 2006 |
| Delivary Ltd | Transport & logistics | 2025 |
| Delk Group Ltd | Professional & scientific | 2026 |
| Delkin Europe Ltd | Manufacturing | 2006 |
| Delorean Homes Ltd | Financial services | 2022 |
| Delrx Ltd | Transport & logistics | 2011 |
| Delta Advance Ltd | Health & social care | 2025 |
| Delta Tract Ltd | Construction | 2014 |
| Delta Whiskey S2O Ltd | Professional & scientific | 2025 |
| DELTA6 Construction Limited | Real estate | 2025 |
| Deluxe Dessert Haven Limited | Wholesale & retail | 2024 |
| Deluxe Gold Limited | Wholesale & retail | 2025 |
| Delves East Estate Management Limited | Hospitality | 1996 |
| Delves Food and Wine Stop Limited | Wholesale & retail | 2011 |
| Delwick Ltd | Other services | 2015 |
| Demetria's Plaice Limited | Hospitality | 2023 |
| Demidebo Limited | Public administration | 2024 |
| Demmerys Limited | Wholesale & retail | 2018 |
| Demontfort Properties Midlands Limited | Real estate | 2016 |
| Demontfort Property Investments Limited | Real estate | 2018 |
| Dengen Ltd | Transport & logistics | 2015 |
| Denholm Event Management Limited | Administrative & support | 2006 |
| Denice Mastersons International Limited | Water & waste | 2007 |
| Denim Design Corp Limited | Wholesale & retail | 2015 |
| Denis GN Sales Ltd | Wholesale & retail | 2025 |
| Denreviz Ltd | Transport & logistics | 2024 |
| Dent Craft Paintless Dent Removal Limited | Wholesale & retail | 2012 |
| Dentabone Limited | Manufacturing | 2023 |
| Dentspark Limited | Health & social care | 2018 |
| Denver Light Railway Limited | Manufacturing | 2014 |
| Denwells 2020 Ltd | Transport & logistics | 2020 |
| Deny Same Day Care Ltd | Public administration | 2022 |
| Dera IA Ltd | Hospitality | 2026 |
| Dera's Shakehouse Limited | Hospitality | 2025 |
| Dermatology Singh Limited | Health & social care | 2022 |
| Derzyfan Ltd | Administrative & support | 2024 |
| Desi Grill & Curry House Ltd | Hospitality | 2023 |
| Design Niche Ltd | Wholesale & retail | 2026 |
| Design Sense Ltd | Professional & scientific | 2017 |
| Design Species Ltd | Manufacturing | 2025 |
| Designerbrandsforyou Ltd | Wholesale & retail | 2012 |
| Desmond Security Services Ltd | Administrative & support | 2025 |
| Dessert Plant Ltd | Hospitality | 2024 |
| Detroit Deep PAN Limited | Hospitality | 2022 |
| Deuces Wild Limited | Hospitality | 2011 |
| Developments Direct Limited | Information & communication | 2021 |
| Devere Ventures Limited | Construction | 2021 |
| Devine Concept Services Ltd | Wholesale & retail | 2022 |
| Devkumar and Co Ltd | Wholesale & retail | 2025 |
| Devops ARC Limited | Information & communication | 2025 |
| Devsight Ltd | Extraterritorial | 2014 |
| Devurit Limited | Information & communication | 2025 |
| Dewcare Ltd | Health & social care | 2023 |
| DEX Bar & Grill Ltd | Hospitality | 2019 |
| Dezereels Ltd | Information & communication | 2022 |
| DF Healthcare Support Limited | Administrative & support | 2026 |
| DF Multiservices Limited | Construction | 2010 |
| DG Machineshop Services Ltd | Manufacturing | 2020 |
| DGS Healthcare Ltd | Health & social care | 2024 |
| DGS Investments Holding Ltd | Professional & scientific | 2026 |
| DH1 Maintenance Ltd | Construction | 2019 |
| Dhaliwal Builderz Ltd | Construction | 2023 |
| Dhaliwall Properties Limited | Real estate | 2021 |
| Dhanda Consulting Limited | Information & communication | 2024 |
| DHC EA Consulting Ltd | Information & communication | 2013 |
| Dhesi Properties & Investments Ltd | Real estate | 2022 |
| Dhillon Accountants Limited | Professional & scientific | 2002 |
| Dhillon Capital Management Limited | Financial services | 2014 |
| Dhillon Commercial Group Ltd | Real estate | 2025 |
| Dhillon Property Group Ltd | Real estate | 2026 |
| Dhindsa Transport Limited | Transport & logistics | 2026 |
| Dhinsa Practice Ltd | Health & social care | 2022 |
| Dhinsa Realty Limited | Real estate | 2022 |
| Dhruv's Inns Ltd | Hospitality | 2018 |
| DHS Care Ltd | Public administration | 2023 |
| DI Mezzo Limited | Extraterritorial | 2011 |
| Diamond Barbers Ltd | Wholesale & retail | 2022 |
| Diamond Care Group Limited | Health & social care | 2022 |
| Diamond Crimson Ltd | Hospitality | 2025 |
| Diamond Hill Walsall Limited | Hospitality | 2024 |
| Diamond Laboratory Ltd | Manufacturing | 2018 |
| Diamond Shack Ltd | Hospitality | 2025 |
| Diamonds Sparkle Limited | Administrative & support | 2024 |
| Diane's Doggies Ltd | Agriculture & fishing | 2024 |
| Dickie Webster Limited | Construction | 2009 |
| Dickson Care Ltd | Health & social care | 2021 |
| DIE Cutting Formes Limited | Construction | 2015 |
| Diecast Classics & Services Limited | Wholesale & retail | 1995 |
| Digby's Cafe Limited | Hospitality | 2003 |
| Digheni Property Limited | Real estate | 2018 |
| Digiacct Finance Ltd | Professional & scientific | 2026 |
| Digimay Ltd | Wholesale & retail | 2025 |
| Digit Audio Technology Limited | Manufacturing | 2020 |
| Digit Music Limited | Arts & recreation | 2018 |
| Digital by Default Ltd | Professional & scientific | 2012 |
| Digital MIX Marketing Ltd | Other services | 2024 |
| Digital Native Academy Limited | Information & communication | 2006 |